Nobel Peace Prize laureate Malala Yousafzai stands with girls inside a classroom at a school for Syrian refugee girls, built by the NGO Kayany Foundation, in Lebanon’s Bekaa Valley

Nobel Peace Prize laureate Malala Yousafzai stands with girls inside a classroom at a school for Syrian refugee girls, built by the NGO Kayany Foundation, in Lebanon’s Bekaa Valley

Nobel Peace Prize laureate Malala Yousafzai (C) stands with girls inside a classroom at a school for Syrian refugee girls, built by the NGO Kayany Foundation, in Lebanon’s Bekaa Valley July 12, 2015. Malala, the youngest winner of the Nobel Peace Prize, celebrated her 18th birthday in Lebanon on Sunday by opening the school and called on world leaders to invest in “books not bullets”. The Malala Fund, a non-profit organisation that supports local education projects, paid for the school in the Bekaa Valley, close to the Syrian border. It can welcome up to 200 girls aged 14 to 18. REUTERS/Jamal Saidi TPX IMAGES OF THE DAY